Ameghiniana最新文献_第6页

Mesoceratocanthus Fossils from the Early Cretaceous of China Reinterpreted as the Earliest Passaloids (Coleoptera: Scarabaeoidea) 中国早白垩世中角兽化石被重新诠释为最早的金龟子类(鞘翅目:金龟子总科)

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-05-26 DOI: 10.5710/AMGH.26.04.2022.3502

Yan‐Da Li, Erik Tihelka, Christopher J. Marshall, D. Maddison, M. Bai, Diying Huang, Chen-yang Cai

{"title":"Mesoceratocanthus Fossils from the Early Cretaceous of China Reinterpreted as the Earliest Passaloids (Coleoptera: Scarabaeoidea)","authors":"Yan‐Da Li, Erik Tihelka, Christopher J. Marshall, D. Maddison, M. Bai, Diying Huang, Chen-yang Cai","doi":"10.5710/AMGH.26.04.2022.3502","DOIUrl":"https://doi.org/10.5710/AMGH.26.04.2022.3502","url":null,"abstract":"Abstract. The scarabaeoid beetle Mesoceratocanthus from the Early Cretaceous Yixian Formation was originally placed in the extant tribe Ivieolini (Hybosoridae). Our re-examination of the holotype and a new specimen demonstrates that Mesoceratocanthus does not possess the diagnostic characters of Ivieolini or Hybosoridae. Instead, it should be assigned to the passaloid lineage (Passalopalpidae + Passalidae) and appears closely related to the extinct family Passalopalpidae. The revised placement of Mesoceratocanthus further extends the earliest occurrence of the passaloid clade (∼125 Ma, Barremian to early Aptian). Resumen. El escarabajo scarabaeoideo Mesoceratocanthus de la Formación Yixian del Cretácico Inferior se asignó originalmente a la tribu existente Ivieolini (Hybosoridae). El nuevo examen del holotipo y de un nuevo espécimen demuestran que Mesoceratocanthus no posee los caracteres diagnósticos de Ivieolini o Hybosoridae. En cambio, debería asignarse al linaje passaloideo (Passalopalpidae + Passalidae) estando estrechamente relacionado con la familia extinta Passalopalpidae. La nueva asignación de Mesoceratocanthus cambia la primera aparición del clado passaloide (∼ 125 Ma, del Barremiano al Aptiano temprano).","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"59 1","pages":"201 - 209"},"PeriodicalIF":1.0,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42873108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pnso Field Guide to the Ancient World: Age of Pterosaurs 古代世界野外指南:翼龙时代

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-05-26 DOI: 10.5710/1851-8044-59.3.221

Laura S. Codorniú

引用次数: 0

The Origin of Snakes: Morphology and the Fossil Record (1st Edition) 蛇的起源：形态学与化石记录（第1版）

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-03-15 DOI: 10.5710/1851-8044-59.2.171

F. Garberoglio

引用次数: 0

Re-Evaluating Cranial Pathways of the Internal Carotid Artery in Notoungulata (Mammalia, Panperissodactyla) 重新评估Notoungulata（哺乳动物，Panperisodactyla）颈内动脉的颅内通路

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-03-15 DOI: 10.5710/AMGH.06.12.2021.3465

R. Macphee, A. Forasiepi

{"title":"Re-Evaluating Cranial Pathways of the Internal Carotid Artery in Notoungulata (Mammalia, Panperissodactyla)","authors":"R. Macphee, A. Forasiepi","doi":"10.5710/AMGH.06.12.2021.3465","DOIUrl":"https://doi.org/10.5710/AMGH.06.12.2021.3465","url":null,"abstract":"Abstract. On the basis of selected osteological markers, Patterson (1936) identified two pathways (here designated A and B) along which the internal carotid artery in notoungulates was said to travel in order to enter the skull and supply the brain. The existence of these pathways, at least as Patterson defined them, has been disputed but no substantive alternatives have been proposed. Using comparative embryological and morphological evidence based on conditions in extant mammals, we find that pathway A (intratympanic) is not supported. Pathway B (enclosed extratympanic) is supportable, but as far as is now known applies only to a small number of notoungulate taxa. On the basis of new evidence, we propose another route, pathway C, briefly mentioned by Scott (1912) but subsequently ignored, that may apply to the majority of notoungulates. In pathway C (unenclosed extratympanic) the internal carotid passed directly into the endocranium via a naturally unossified area of the basicranium, the piriform fenestra, rather than coursing through or alongside the middle ear in a canal. The absence of a separate, bony carotid foramen on the basicranium's ventral surface may explain the hesitancy of previous workers to consider this routing. There is no evidence that the function of the internal carotid artery was supplanted by another vessel (e.g., external carotid artery) in any notoungulate. Conditions in other major clades of South American native ungulates are poorly investigated, but some clearly differed from notoungulates in carotid patterning, pointing to the existence of substantial intertaxon disparities.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"59 1","pages":"141 - 161"},"PeriodicalIF":1.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49072303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Bryozoans Associated with Gastropod Shells in the Early Miocene of Patagonia (Argentina) 阿根廷巴塔哥尼亚早中新世腹足类动物的苔藓虫

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-03-15 DOI: 10.5710/AMGH.27.01.2022.3485

L. Pérez, J. López-Gappa

引用次数: 0

Coccolithophores: Cenozoic Discoasterales - Biology, Taxonomy, Stratigraphy Coccolithophores:新生代盘星目-生物学、分类学、地层学

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-03-15 DOI: 10.5710/1851-8044-59.2.174

J. P. Pérez Panera

引用次数: 2

Paleoenvironmental Relevance of Amorphous Silica Microfossils in Hydromorphic Paleosols, a Comparative Study with Modern Analogous Environments in the Southern Pampas, Argentina 阿根廷潘帕斯南部水形古土壤中无定形二氧化硅微化石的古环境相关性与现代类似环境的比较研究

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-03-15 DOI: 10.5710/AMGH.16.10.2021.3461

Roberto Donna, G. Hassan, M. Osterrieth

{"title":"Paleoenvironmental Relevance of Amorphous Silica Microfossils in Hydromorphic Paleosols, a Comparative Study with Modern Analogous Environments in the Southern Pampas, Argentina","authors":"Roberto Donna, G. Hassan, M. Osterrieth","doi":"10.5710/AMGH.16.10.2021.3461","DOIUrl":"https://doi.org/10.5710/AMGH.16.10.2021.3461","url":null,"abstract":"Abstract. In this contribution, we describe assemblages of amorphous silica microfossils from a hydromorphic paleosol of the Southern Pampas and discuss their paleoenvironmental relevance through a comparative analysis with assemblages from two modern shallow lakes. The hydromorphic paleosol analyzed, assigned to the Pliocene/Pleistocene boundary by previous studies, is exposed in the coastal cliffs of the southeastern Buenos Aires province, Argentina. The shallow lakes selected as modern analogous environments are located 4.5 kilometers away. The hydromorphic paleosol contained well-preserved silicophytoliths, whereas diatoms, chrysophycean cysts, and spicules of sponges, were found in low abundances and poorly preserved. In the modern shallow lakes, silicophytoliths were also the main component of the assemblages, being diatoms the second most abundant component. Chrysophycean cysts were found in low abundances and represented by fourteen different types of cysts, five of which are mentioned for the first time in Argentina. Spicules of sponges were rarely found, represented only by fragmented megascleres. Considering the relevance of silicophytoliths for this record, we conducted a comparative analysis that allowed us to infer temperate humid paleoclimate during the pedogenesis of the hydromorphic paleosol. This is the first study comparing the silicophytolith assemblages from a hydromorphic paleosol with a local modern analogous environment. Our results highlight the potential use of amorphous silica microfossils as bioindicators in paleosols of the Late Cenozoic pedosedimentary successions of the Southern Pampas, where the homogeneous lithology has been an obstacle for the understanding of the paleoenvironmental evolution of the region.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"59 1","pages":"127 - 140"},"PeriodicalIF":1.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47843711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ten Essentials to Understand Dinosaurs 了解恐龙的十大要素

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-01-18 DOI: 10.5710/1851-8044-59.1.117

A. Otero

引用次数: 0

Introduction to Paleobiology and the Fossil Record (2nd Edition) 古生物学导论与化石记录（第二版）

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-01-18 DOI: 10.5710/1851-8044-59.1.120

E. Vera

引用次数: 0

The Axial Skeleton of Rinconsaurus caudamirus (Sauropoda: Titanosauria) from the Late Cretaceous of Patagonia, Argentina 阿根廷巴塔哥尼亚晚白垩世caudamirus Rinconsaurus(蜥脚目:泰坦龙)的轴向骨架

IF 1 4区地球科学

Ameghiniana Pub Date : 2022-01-06 DOI: 10.5710/AMGH.13.09.2021.3427

Agustín Pérez Moreno, J. Carballido, A. Otero, L. Salgado, J. Calvo

{"title":"The Axial Skeleton of Rinconsaurus caudamirus (Sauropoda: Titanosauria) from the Late Cretaceous of Patagonia, Argentina","authors":"Agustín Pérez Moreno, J. Carballido, A. Otero, L. Salgado, J. Calvo","doi":"10.5710/AMGH.13.09.2021.3427","DOIUrl":"https://doi.org/10.5710/AMGH.13.09.2021.3427","url":null,"abstract":"Abstract. Titanosaurs were the predominant herbivores during the Late Cretaceous, inhabiting all continents. This clade was especially diverse in South America with some of the largest and smallest sauropod species known to date. Despite its diversity, the evolution of this clade is far from being well-known, although some recent analyses have begun to find some consensus in their results. Rinconsauria (defined as the least inclusive clade containing Rinconsaurus and Muyelensaurus) includes small titanosaurs and is considered as closely related to the lineage of giant titanosaurs, Lognkosauria (defined as the least inclusive clade containing Futalognkosaurus and Mendozasaurus), both being part of the recently named clade Colossosauria. The titanosaur Rinconsaurus caudamirus, from the Bajo de la Carpa Formation (Santonian), Río Negro, Argentina, is represented by several axial and appendicular elements from at least four specimens. This taxon was only briefly described when it was named and most of its originally proposed autapomorphies are now recognized as having a more widespread distribution amongst titanosaurs. Herein we present a detailed osteological description of the axial skeleton and a revised diagnosis for this taxon that firmly establishes its validity. Based on comparisons with other titanosaurs, we found three new possible autapomorphies for the axial skeleton of Rinconsaurus, which added to its original combination of characters, endorsing this taxon as a valid genus. Besides, this revision of Rinconsaurus provides additional osteological data that will contribute to a better resolution of titanosaur phylogeny, contributing at the same time to our understanding of the clade Rinconsauria.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"59 1","pages":"1 - 46"},"PeriodicalIF":1.0,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44044024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5